My usual suggestion is if you have a need now, buy now.
If you wait for the next best thing, you will wait forever.
Nobody really knows what amd or Intel will bring several months from now.
No doubt new products will have a better price/performance than the old.
(or why introduce them at all?)
4690K is still a very capable processor, particularly if you are able to overclock.
Try this test:
Run YOUR games, but lower your resolution and eye candy.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.
If you think you need a faster core speed or more threads, I would point more to the 6 core i5-9600K. It uses a soldered heat spreader and will OC to perhaps 5.0.
If you are more graphics limited, you can go ahead and buy a RTX2060 or GTX1660ti.
Either will be a nice upgrade